Addons.mozilla.org (AMO), is Mozilla's official site for discovering and installing add-ons for the Firefox browser. Add-ons help you modify and personalize your browsing experience by adding new features to Firefox, enhancing your interactions with Web content, and changing the way your browser looks.

A community of creators

The add-ons listed here are created by thousands of developers and theme designers from all over the world, ranging from individual hobbyists to large corporations. Some add-ons listed on AMO have been automatically published and may be subject to review by a team of editors once publicly listed.

Get involved

Mozilla is a non-profit champion of the Internet, we build Firefox to help keep it healthy, open and accessible. Add-ons support user choice and customization in Firefox, and you can contribute in the following ways:

Make your own add-on. We provide free hosting and update services and can help you reach a large audience of users.

Help improve this website. It's open source, and you can file bugs and submit patches. You can get started with a good first bug or view all open issues for AMO’s server and frontend on Github.

Leave feedback for your favorite add-ons. Add-on authors are more likely to improve their add-ons and create new ones when they know people appreciate their work.

Tell your friends and family that Firefox is a fast, secure browser that protects their privacy, and they can use add-ons to make it their own!

To see more ways you can contribute to the add-on community, please visit our wiki.

Get support

If you would like to learn more about how to manage add-ons in Firefox, or need to find general Firefox support, please visit Support Mozilla. If you don't find an answer there, you can ask on our community forum.